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Date: Sun, 10 Feb 2019 21:35:07 +0100
From: DK7FC <selberdenken@posteo.de>
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References: <1bd64d1b-12b3-4abc-b7f0-34a0076c2c9f@email.android.com>,<5C60209B.8080602@posteo.de> <6DB8451D7F3D3947A5918808A59621EA31522A7D@servigilant.vigilant.local>
In-Reply-To: <6DB8451D7F3D3947A5918808A59621EA31522A7D@servigilant.vigilant.local>
Subject: Re: VLF: in EA?
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Hello Luis,

Am 10.02.2019 19:42, schrieb VIGILANT Luis Fernández:
>
> Got a 7Kg x 0.20mm coil of wire from a company which used to wind 
> their own motors (time ago)
Oh that will be enough! 0.2 mm is almost a bit thin but still ok. But it 
will not handle more than 250 mA i think, when using some forced 
cooling, otherwise it may hold 200 mA.

> Yes Stefan, I plan to use the double side bonding tape and kapton. One 
> question about it:
> Do you place kapton over the plastic as a base layer ? or just 
> covering the coil as end layer ?
I just covered the winding. As soon as the fresh wound coil allowed to 
add another layer of the Kapton tape i fixed it, i.e. it was wound 
arround the coil during the winding process. This gives a good 
mechanical stability from the first moment.
The pot is out of PVC so one has to take care not to cause an arcing 
track on the surface. Prevent it from humdity and sunlight. However due 
to the stacking of pots, which will be necessary, the voltage between 
two pots should not be higher than something arround 5 kV and therefore 
the field strength along the winding (or volts per turn) will be small, 
so it is not crtical to use PVC. All my recent wound coils are on PVC.

73, Stefan

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Hello Luis, <br>
<br>
Am 10.02.2019 19:42, schrieb VIGILANT Luis Fern&aacute;ndez:
<blockquote
 cite="mid:6DB8451D7F3D3947A5918808A59621EA31522A7D@servigilant.vigilant.local"
 type="cite">
  <meta http-equiv="Content-Type"
 content="text/html; charset=ISO-8859-1">
  <style type="text/css" id="owaParaStyle"></style>
  <div
 style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0); font-size: 10pt;"><br>
  <div>Got a 7Kg x 0.20mm coil of wire from a company which used to
wind their own motors (time ago)</div>
  </div>
</blockquote>
Oh that will be enough! 0.2 mm is almost a bit thin but still ok. But
it will not handle more than 250 mA i think, when using some forced
cooling, otherwise it may hold 200 mA.<br>
<br>
<blockquote
 cite="mid:6DB8451D7F3D3947A5918808A59621EA31522A7D@servigilant.vigilant.local"
 type="cite">
  <div
 style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0); font-size: 10pt;">
  <div>Yes Stefan, I plan to use the double side bonding tape and
kapton. One question about it:</div>
  <div>Do you place kapton over the plastic as a base layer ? or just
covering the coil as end layer ?</div>
  </div>
</blockquote>
I just covered the winding. As soon as the fresh wound coil allowed to
add another layer of the Kapton tape i fixed it, i.e. it was wound
arround the coil during the winding process. This gives a good
mechanical stability from the first moment.<br>
The pot is out of PVC so one has to take care not to cause an arcing
track on the surface. Prevent it from humdity and sunlight. However due
to the stacking of pots, which will be necessary, the voltage between
two pots should not be higher than something arround 5 kV and therefore
the field strength along the winding (or volts per turn) will be small,
so it is not crtical to use PVC. All my recent wound coils are on PVC.<br>
<br>
73, Stefan<br>
</body>
</html>

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